<template>
  <div class="img">
    <a-upload
      name="file"
      listType="picture-card"
      :multiple="isMultiple"
      :action="uploadAction"
      :headers="headers"
      :data="{biz:bizPath}"
      :fileList="fileList"
      :beforeUpload="beforeUpload"
      :disabled="disabled"
      :isMultiple="isMultiple"
      :showUploadList="isMultiple"
      :accept="acceptFormat"
      @change="handleChange"
      @preview="handlePreview"
      :class="!isMultiple?'imgupload':''">
      <div class="img-div" :style="{'width':(!isMultiple?imgWidth+'px':'auto'),'height':(!isMultiple?imgHeight+'px':'auto')}">
        <img v-if="!isMultiple && picUrl" :src="getAvatarView()" style="width:100%;height:100%;"/>
        <div v-else class="iconp">
          <a-icon :type="uploadLoading ? 'loading' : 'plus'" />
          <div class="ant-upload-text">{{ text }}</div>
        </div>
      </div>
      <a-modal :visible="previewVisible" :footer="null" @cancel="handleCancel()">
        <img alt="example" style="width: 100%" :src="previewImage"/>
      </a-modal>
    </a-upload>
  </div>
</template>

<script>
    import Vue from 'vue'
    import { ACCESS_TOKEN } from "@/store/mutation-types"
    import { getFileAccessHttpUrl } from '@/api/manage'

    const uidGenerator=()=>{
        return '-'+parseInt(Math.random()*10000+1,10);
    }
    const getFileName=(path)=>{
        if(path.lastIndexOf("\\")>=0){
            let reg=new RegExp("\\\\","g");
            path = path.replace(reg,"/");
        }
        return path.substring(path.lastIndexOf("/")+1);
    }
    export default {
        name: 'JImageUpload',
        data(){
            return {
                uploadAction:window._CONFIG['domianURL']+"/sys/common/upload",
                uploadLoading:false,
                picUrl:false,
                headers:{},
                fileList: [],
                previewImage:"",
                previewVisible: false,
            }
        },
        props:{
            text:{
                type:String,
                required:false,
                default:"上传"
            },
            /*这个属性用于控制文件上传的业务路径*/
            bizPath:{
                type:String,
                required:false,
                default:"temp"
            },
            value:{
                type:[String,Array],
                required:false
            },
            imgIndex:{
                type:Number,
                required:false
            },
            disabled:{
                type:Boolean,
                required:false,
                default: false
            },
            isMultiple:{
                type:Boolean,
                required:false,
                default: false
            },

            imgWidth:{
              type: Number,
              required: false,
              default:104
            },
            imgHeight:{
              type:Number,
              required:false,
              default:104
            },
            acceptFormat:{
              type:String,
              required:false
            },
            //update-begin-author:wangshuai date:20201021 for:LOWCOD-969 新增number属性，用于判断上传数量
            number:{
                type:Number,
                required:false,
                default:0
            }
            //update-end-author:wangshuai date:20201021 for:LOWCOD-969 新增number属性，用于判断上传数量
        },
        watch:{
            value: {
                handler(val,oldValue) {
                    if (val instanceof Array) {
                        this.initFileList(val.join(','))
                    } else {
                        this.initFileList(val)
                    }
                    if(!val || val.length==0){
                        this.picUrl = false;
                    }
                },
                //立刻执行handler
                immediate: true
            }
        },
        created(){
            const token = Vue.ls.get(ACCESS_TOKEN);
            this.headers = {"X-Access-Token":token}
        },
        methods:{
            initFileList(paths){
                if(!paths || paths.length==0){
                    this.fileList = [];
                    return;
                }
                this.picUrl = true;
                let fileList = [];
                let arr = paths.split(",")
                for(var a=0;a<arr.length;a++){
                    let url = getFileAccessHttpUrl(arr[a]);
                    fileList.push({
                        uid: uidGenerator(),
                        name: getFileName(arr[a]),
                        status: 'done',
                        url: url,
                        response:{
                            status:"history",
                            message:arr[a]
                        }
                    })
                }
                this.fileList = fileList
            },
            beforeUpload: function(file){
                var fileType = file.type;
                if(fileType.indexOf('image')<0){
                    this.$message.warning('请上传图片');
                    return false;
                }
            },
            handleChange(info) {
                this.picUrl = false;
                let fileList = info.fileList
                //update-begin-author:wangshuai date:20201022 for:LOWCOD-969 判断number是否大于0和是否多选，返回选定的元素。
                if(this.number>0 && this.isMultiple){
                    fileList = fileList.slice(-this.number);
                }
                //update-end-author:wangshuai date:20201022 for:LOWCOD-969 判断number是否大于0和是否多选，返回选定的元素。
                if(info.file.status==='done'){
                    if(info.file.response.success){
                        this.picUrl = true;
                        fileList = fileList.map((file) => {
                            if (file.response) {
                                file.url = file.response.message;
                            }
                            return file;
                        });
                    }
                    //this.$message.success(`${info.file.name} 上传成功!`);
                }else if (info.file.status === 'error') {
                    this.$message.error(`${info.file.name} 上传失败.`);
                }else if(info.file.status === 'removed'){
                    this.handleDelete(info.file)
                }
                this.fileList = fileList
                if(info.file.status==='done' || info.file.status === 'removed'){
                    this.handlePathChange()
                }
            },
            // 预览
            handlePreview (file) {
                this.previewImage = file.url || file.thumbUrl
                this.previewVisible = true
            },
            getAvatarView(){
                if(this.fileList.length>0){
                    let url = this.fileList[0].url
                    return getFileAccessHttpUrl(url)
                }
            },
            handlePathChange(){
                let uploadFiles = this.fileList
                let path = ''
                if(!uploadFiles || uploadFiles.length==0){
                    path = ''
                }
                let arr = [];
                if(!this.isMultiple){
                    arr.push(uploadFiles[uploadFiles.length-1].response.message)
                }else{
                    for(let a=0;a<uploadFiles.length;a++){
                        // update-begin-author:taoyan date:20200819 for:【开源问题z】上传图片组件 LOWCOD-783
                        if(uploadFiles[a].status === 'done' ) {
                            arr.push(uploadFiles[a].response.message)
                        }else{
                            return;
                        }
                        // update-end-author:taoyan date:20200819 for:【开源问题z】上传图片组件 LOWCOD-783
                    }
                }
                if(arr.length>0){
                    path = arr.join(",")
                }
                this.$emit('change', path,this.imgIndex);
            },
            handleDelete(file){
                //如有需要新增 删除逻辑
                console.log(file)
            },
            handleCancel() {
                this.close();
                this.previewVisible = false;
            },
            close () {

            },
        },
        model: {
            prop: 'value',
            event: 'change'
        }
    }
</script>

<style scoped>
  /* update--begin--autor:lvdandan-----date:20201016------for：j-image-upload图片组件单张图片详情回显空白
  * https://github.com/zhangdaiscott/jeecg-boot/issues/1810
  * https://github.com/zhangdaiscott/jeecg-boot/issues/1779
  */
  /deep/ .imgupload .ant-upload-select{display:block}
  /deep/ .imgupload .ant-upload.ant-upload-select-picture-card{ width:120px;height: 120px;}
  /deep/ .imgupload .iconp{padding:32px;}
  /* update--end--autor:lvdandan-----date:20201016------for：j-image-upload图片组件单张图片详情回显空白*/
</style>
